Morphology and phylogeny of a new wall-less freshwater volvocalean flagellate, Hapalochloris nozakii gen. et sp. nov. (Volvocales, Chlorophyceae).

abstract：:Chlorella-like coccoid green algae are widely distributed in almost all terrestrial habitats and belong to different lineages of the Chlorophyceae and Trebouxiophyceae. The Watanabea clade of the Trebouxiophyceae shows a high genetic biodiversity. Re-investigation of the authentic strain of the rarely found W. renifor...

journal_title：Journal of phycology

authors： Darienko T,Pröschold T

更新日期：2019-04-01 00:00:00

abstract：:In Chlamydomonas reinhardtii P. A. Dangeard, mitochondrial morphology has been observed during asexual cell division cycle, gamete and zygote formation, zygote maturation, and meiotic stages. However, the chronological transition of mitochondrial morphology after the stationary phase of vegetative growth, defined as t...

journal_title：Journal of phycology

authors： Aoyama H,Kuroiwa T,Nakamura S

更新日期：2013-04-01 00:00:00

abstract：:Diatoms are perhaps the most diverse lineage of eukaryotic algae, with their siliceous cell wall and diplontic life history often considered to have played important roles in their extraordinary diversification. The characteristic diminution of the diatom cell wall over the course of vegetative growth provides a relia...

journal_title：Journal of phycology

authors： Kessenich CR,Ruck EC,Schurko AM,Wickett NJ,Alverson AJ

更新日期：2014-12-01 00:00:00

abstract：:Historically, the genus Calothrix included all noncolonial, tapered, heterocytous filaments within the cyanobacteria. However, recent molecular phylogenies show that "Calothrix" defined in this sense represents five distinct clades. The type species of Calothrix is marine, with solitary basal heterocytes, no akinetes,...

journal_title：Journal of phycology

authors： Berrendero Gómez E,Johansen JR,Kaštovský J,Bohunická M,Čapková K

更新日期：2016-08-01 00:00:00

abstract：:Microbial eukaryotes may extinguish much of their nuclear phylogenetic history due to endosymbiotic/horizontal gene transfer (E/HGT). We studied E/HGT in 32,110 contigs of expressed sequence tags (ESTs) from the dinoflagellate Alexandrium tamarense (Dinophyceae) using a conservative phylogenomic approach. The vast maj...

journal_title：Journal of phycology

authors： Chan CX,Soares MB,Bonaldo MF,Wisecaver JH,Hackett JD,Anderson DM,Erdner DL,Bhattacharya D

更新日期：2012-10-01 00:00:00

abstract：:The formation of archeospores is characteristic of Porphyra yezoensis Ueda and is important for Porphyra aquaculture. Recently, it has been regarded as a valuable seed source for propagation of thalli in mariculture. Cell wall composition changes are associated with archeospore formation in P. yezoensis. Here, we repo...

journal_title：Journal of phycology

authors： Gao S,Wang G,Yang R,Xie X,Pan G,Xu P,Zhu J

更新日期：2011-08-01 00:00:00

abstract：:Chroococcidiopsis Geitler (Geitler 1933) is a genus of cyanobacteria containing desiccation and radiation resistant strains. Members of the genus live in habitats ranging from hot and cold deserts to fresh and saltwater environments. Morphology and cell division pattern have historically been used to define the genus....

journal_title：Journal of phycology

authors： Cumbers J,Rothschild LJ

更新日期：2014-06-01 00:00:00

abstract：:Exopolymer particles are found throughout the ocean and play a significant biogeochemical role in carbon cycling. Transparent exopolymer particles (TEP) are composed of acid polysaccharides, and Coomassie staining particles (CSP) are proteins. TEPs have been extensively studied in the ocean, while CSP have been largel...

journal_title：Journal of phycology

authors： Thornton DCO,Chen J

更新日期：2017-04-01 00:00:00

abstract：:Temporal and spatial variations in Sargassum ilicifolium thallus density and length were investigated on equatorial coral reefs in Singapore from November 2011 to October 2012. Thalli density varied little throughout the year, however, we found strong seasonal patterns in thallus length and identified temperature as t...

journal_title：Journal of phycology

authors： Low JKY,Fong J,Todd PA,Chou LM,Bauman AG

更新日期：2019-04-01 00:00:00

abstract：:The cell wall of Chlamydomonas reinhardtii zygotes, which forms rapidly after the fusion of wall-free gametes, provides a tractable system for studying the properties and assembly of hydroxyproline-rich glycoproteins, the major proteinaceous components of green algal and plant cell walls. We report the cloning of the ...

journal_title：Journal of phycology

authors： Suzuki L,Woessner JP,Uchida H,Kuroiwa H,Yuasa Y,Waffenschmidt S,Goodenough UW,Kuroiwa T

更新日期：2000-06-01 00:00:00

abstract：:A multi-gene (SSU, LSU, psbA, and COI) molecular phylogeny of the family Corallinaceae (excluding the subfamilies Lithophylloideae and Corallinoideae) showed a paraphyletic grouping of six monophyletic clades. Pneophyllum and Spongites were reassessed and recircumscribed using DNA sequence data integrated with morpho-...

journal_title：Journal of phycology

authors： Caragnano A,Foetisch A,Maneveldt GW,Millet L,Liu LC,Lin SM,Rodondi G,Payri CE

更新日期：2018-06-01 00:00:00

abstract：:Polytomella is a genus of colorless green algae in the Reinhardtinia clade of the Chlamydomonadales, which has proven useful for a broad range of studies particularly those exploring the evolutionary loss of photosynthesis and mitochondrial genomics/biochemistry. Although 13 Polytomella strain accessions are currently...

journal_title：Journal of phycology

authors： MacDonald SM,Lee RW

更新日期：2016-08-01 00:00:00

abstract：:Identification of horizontal gene transfers (HGTs) has primarily relied on phylogenetic tree based methods, which require a rich sampling of sequenced genomes to ensure a reliable inference. Because the success of phylogenetic approaches depends on the breadth and depth of the database, researchers usually apply strin...

journal_title：Journal of phycology

authors： Pandey RS,Saxena G,Bhattacharya D,Qiu H,Azad RK

更新日期：2017-02-01 00:00:00

abstract：:Brown tides of the marine pelagophyte Aureococcus anophagefferens Hargraves et Sieburth have been investigated extensively for the past two decades. Its growth is fueled by a variety of nitrogen (N) compounds, with dissolved organic nitrogen (DON) being particularly important during blooms. Characterization of a cDNA ...

journal_title：Journal of phycology

authors： Berg GM,Shrager J,Glöckner G,Arrigo KR,Grossman AR

更新日期：2008-10-01 00:00:00

abstract：:Due to their ecological, physiological, and molecular adaptations to low and varying temperatures, as well as varying seasonal irradiances, polar non-marine eukaryotic microalgae could be suitable for low-temperature biotechnology. Adaptations include the synthesis of compounds from different metabolic pathways that p...

journal_title：Journal of phycology

authors： Shukla SP,Kvíderová J,Adamec L,Elster J

更新日期：2020-04-01 00:00:00

abstract：:The photoprotective response in the dinoflagellate Glenodinium foliaceum F. Stein exposed to ultraviolet-A (UVA) radiation (320-400 nm; 1.7 W · m(2) ) and the effect of nitrate and phosphate availability on that response have been studied. Parameters measured over a 14 d growth period in control (PAR) and experimental...

journal_title：Journal of phycology

authors： White DA,Polimene L,Llewellyn CA

更新日期：2011-10-01 00:00:00

abstract：:The Aleutian Archipelago coastal ecosystem has undergone a dramatic change in community composition during the past two decades. Following the removal of ∼99% of the sea otters, Enhydra lutris, from the ecosystem, changes to the benthic communities resulted in widespread losses to most of the region's kelp beds and co...

journal_title：Journal of phycology

authors： Edwards MS,Konar B

更新日期：2012-08-01 00:00:00

abstract：:Characeae (Charophyceae, Charophyta) contains two tribes with six genera: tribe Chareae with four genera and tribe Nitelleae, which includes Tolypella and Nitella. This paper uses molecular and morphological data to elucidate the phylogeny of Tolypella species in North America. In the most comprehensive taxonomic trea...

journal_title：Journal of phycology

authors： Stancheva R,Hall JD,Herburger K,Lewis LA,McCourt RM,Sheath RG,Holzinger A

更新日期：2014-10-01 00:00:00

abstract：:Comparisons of the 3 previously used methods (continuous flow centrifugation, Millipore®filtration, and biodialysis) for making water samples seston-free before analysis for cobalamins point to several likely sources of error: (a) unpredictable occlusion of pores in Millipore®membranes during filtration; (b) irreversi...

journal_title：Journal of phycology

authors： Parker BC

更新日期：1969-06-01 00:00:00

abstract：:Light has been identified as one of the main factors affecting seaweed ecophysiology. We investigated the dependence of nutrient metabolism on sun and shade light conditions and whether episodes of upwelling of nutrient-rich subsuperficial water could reduce the summer nutrient limitation driving physiological changes...

journal_title：Journal of phycology

authors： Martínez B,Rico JM

更新日期：2008-02-01 00:00:00

abstract：:Germination tests were conducted on 39 collections of Chara oospores stored under 4 different conditions for periods of approximately 4 yr. In general, storage of dried oospores at low temperatures (3 C) provided the most satisfactory means for long-term preservation of viable disseminules. Oospore germination zuas hi...

journal_title：Journal of phycology

authors： Proctor VI

更新日期：1967-06-01 00:00:00

abstract：:Several unknown mycosporine-like amino acids (MAAs) have been previously isolated from some cultured species of toxic dinoflagellates of the Alexandrium genus (Dinophyceae). One of them, originally called M-333, was tentatively identified as a shinorine methyl ester, but the precise nature of this compound is still un...

journal_title：Journal of phycology

authors： Carignan MO,Carreto JI

更新日期：2013-08-01 00:00:00

abstract：:We tested how the availability of carbon and nitrogen determines both the production of Asparagopsis taxiformis (Delile) V. Trevis. and content of the two major halocarbons, bromoform and dibromoacetic acid. The halogenated secondary metabolites of Asparagopsis species are particularly interesting from an applied pers...

journal_title：Journal of phycology

authors： Mata L,Gaspar H,Santos R

更新日期：2012-02-01 00:00:00

abstract：:The history of group I introns is characterized by repeated horizontal transfers, even among phylogenetically distant species. The symbiogenetic thalli of lichens are good candidates for the horizontal transfer of genetic material among distantly related organisms, such as fungi and green algae. The main goal of this ...

journal_title：Journal of phycology

authors： Del Hoyo A,Álvarez R,Gasulla F,Casano LM,Del Campo EM

更新日期：2018-02-01 00:00:00

abstract：:Partitioning of the carbon (C) fixed during photosynthesis between neutral lipids (NL) and carbohydrates was investigated in Isochrysis sp. (Haptophyceae) in relation to its nitrogen (N) status. Using batch and nitrate-limited continuous cultures, we studied the response of these energy reserve pools to both condition...

journal_title：Journal of phycology

authors： Lacour T,Sciandra A,Talec A,Mayzaud P,Bernard O

更新日期：2012-06-01 00:00:00

abstract：:Xanthophyll cycle-related nonphotochemical quenching (NPQ), which is present in most photoautotrophs, allows dissipation of excess light energy. Xanthophyll cycle-related NPQ depends principally on xanthophyll cycle pigments composition and their effective involvement in NPQ. Xanthophyll cycle-related NPQ is tightly c...

journal_title：Journal of phycology

authors： Lacour T,Babin M,Lavaud J

更新日期：2020-04-01 00:00:00

abstract：:Blooms of Microcystis aeruginosa (Kützing) Kützing occur frequently in many freshwater ecosystems around the world, but the role of environmental factors in promoting the growth and determining the proportion of toxic and non-toxic strains still requires more investigation. In this study, four strains (toxic CPCC299 &...

journal_title：Journal of phycology

authors： Deblois CP,Juneau P

更新日期：2012-08-01 00:00:00

abstract：:The ultrastructural changes which occurred during senescence in the stationary phase of growth of the unicellular green alga Spongiochloris typica were observed. The cell wall consists of a membrane like primary wall and an inner secondary wall which becomes progressively thickened with age of the culture. During sene...

journal_title：Journal of phycology

authors： McLean RJ

更新日期：1968-12-01 00:00:00

abstract：:The family Microchaetaceae is a large group of heterocytous cyanobacteria, whose members bear typical morphological features of uniseriate heteropolar filaments never terminated by thin hairs and with simple false branching. However, phylogenetic analyses of the gene for 16S rRNA showed that members of this traditiona...

journal_title：Journal of phycology

authors： Hauer T,Bohunická M,Johansen JR,Mareš J,Berrendero-Gomez E

更新日期：2014-12-01 00:00:00

abstract：:Filaments in the surface layers of metaphytic mats are exposed to high photon flux densities of PAR and UVBR. We investigated the effect of UVBR exposure on growth of eight isolates of common metaphytic algae (Cladophora, Mougeotia, Oedogonium, Pithophora, Spirogyra, and Zygnema) acclimated to either high or low PAR l...

journal_title：Journal of phycology

authors： O'Neal SW,Hoover AM

更新日期：2018-12-01 00:00:00